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[10:24] <dcz_> when I call VIDIOC_REQBUFS on a v4l device, this de-allocates the memory, right?
[10:24] <dcz_> *with count=0
[10:25] <dcz_> what happens to the buffer FDs I already opened?
[10:27] <dcz_> will attempts to read mmap() ed memory cause segfaults?
[10:28] <dcz_> if I already imported such a buffer, will I get errors when trying to use it or segfaults?
[10:29] <dcz_> never mind, I RTFM
[10:29] <dcz_> the answer is: you can't call that in the first place
[10:30] <sailus> svarbanov: Hi, Stan! Are you ok with me picking 20241101094050.2421038-4-ruanjinjie@huawei.com?
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[10:55] <svarbanov> sailus, Hi Sakari, yes, please :)
[10:56] <sailus> Ack, thanks!
[10:58] <svarbanov> sailus, do you need an Ack for the venus patch?
[10:59] <sailus> I kind of hold the above as such but e-mail would be more formal indeed. :-)
[11:05] <svarbanov> sailus, Done, thanks!
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[14:31] <ribalda> svarbanov: while you are at it, maybe you could take a look at: https://patchwork.linuxtv.org/project/linux-media/list/?series=13856 ?
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[15:01] <dcz_> if I do VIDIOC_EXPBUF, are the contents of the buffer defined?
[15:01] <dcz_> I noticed that the buffer is zeroed out, but can I assume that?
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[17:50] <svarbanov> ribalda, sure I will take a look, thanks.
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[18:32] <pinchartl> dcz: you shouldn't rely on the memory being zeroed
[18:32] <pinchartl> (not sure why you would want to in any case)
[18:44] <dcz> pinchartl: to decide if the interface to grab a buffer should be marked as unsafe
[18:45] <pinchartl> why would it be unsafe ?
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[18:46] <dcz> I was going to say nondeterminism but apparently people on ##rust don't see that as a problem
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[18:56] <pinchartl> it can be non-deterministic, yes, but I don't think that qualifies as unsafe
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[19:00] <dcz> that makes me easier for me. I might actually come up with a safe and powerful API
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